Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
FZG gear efficiency and pin-on-disc frictional study of sintered and wrought steel gear materials
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.). (SKD)
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).ORCID iD: 0000-0003-2489-0688
2015 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 60, no 9Article in journal (Refereed) Published
Abstract [en]

Load-dependent power loss is a major contributor to power loss in gear transmission systems. In this study pin-on-disc frictional and FZG efficiency experiments were conducted with powder metallurgy (Distaloy AQ+0.2%C) and wrought material (16MnCr5) combinations. The gear mesh torque loss from gear efficiency tests and the friction coefficient from the pin-on-disc tests were then compared. The trend for both test series was the same. The combination of 16MnCr5 in contact with Distaloy AQ+0.2%C shows the lowest coefficient of friction and gear mesh torque loss, followed by the combination of Distaloy AQ+0.2%C in contact with itself, and finally the combination of 16MnCr5 in contact with itself.

Place, publisher, year, edition, pages
Springer-Verlag New York, 2015. Vol. 60, no 9
Keyword [en]
Friction, Gear mesh torque loss, Powder metallurgy, FZG gear test rig, Pin-on-disc
National Category
Other Materials Engineering Materials Engineering
Research subject
Engineering Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-187439DOI: 10.1007/s11249-015-0582-6ISI: 000363051300006Scopus ID: 2-s2.0-84941369781OAI: oai:DiVA.org:kth-187439DiVA: diva2:930136
Note

QC 20160523

Available from: 2016-05-23 Created: 2016-05-23 Last updated: 2017-11-30Bibliographically approved
In thesis
1. Efficiency and wear properties of spur gears made of powder metallurgy materials
Open this publication in new window or tab >>Efficiency and wear properties of spur gears made of powder metallurgy materials
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Powder metallurgy (PM) is usually used in manufacturing parts with complex geometries, such as gears and structural parts. The main attractions of PM are the high rate of material utilization, environmental friendliness of production, economic advantages (especially for complex geometries), and possibility of obtaining lighter components. To find a wide range of applications and compete with regular steel gears, PM gear transmissions should have good transmission efficiency and wear properties. Furthermore, they should have low contact noise and adequate surface fatigue properties. Because of the porosity structure of PM gears both on gear flanks and in the body, the friction and wear properties of PM gear flank contacts differ somewhat from those of regular steel gears.

   This doctoral thesis examines the efficiency and wear properties of PM gears. Paper A compares the wear, friction, and damage mechanism properties of two sintered gear materials with those of a standard gear material. Paper B deals with the gear mesh torque loss mechanism of PM and regular steel gears by combining both pin-on-disc frictional and FZG efficiency tests. Paper C comparatively examines the efficiency of PM and regular steel gears by conducting FZG gear efficiency tests. Paper D focuses on the wear and friction properties of PM and regular steel gear materials treated using the triboconditioning process. Paper E studies the friction and wear properties attributable to different pore sizes in PM gear materials.

   The results indicate that regular steel meshed with PM gear material and PM meshed with PM gear material are good candidate combinations for gear transmissions. This is because the porosities of PM material can lower the friction coefficient while the wear rate can be the same as or even better than that of regular steel contacts. The triboconditioning process enhances the wear resistance and reduces the friction coefficient of the PM gear material. The friction and wear coefficients of PM meshed with PM gear material display increasing trends with increasing pore size. The friction and wear coefficients of regular steel meshed with PM gear material display decreasing trends with increasing pore size.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2016. 125 p.
Series
TRITA-MMK, ISSN 1400-1179 ; 2016:04
Keyword
Powder Metallurgy Gears; Efficiency; Wear; Friction; Porosity Structure; FZG gear test rig
National Category
Tribology
Research subject
Machine Design
Identifiers
urn:nbn:se:kth:diva-187446 (URN)978-91-7595-963-4 (ISBN)
Public defence
2016-06-03, Galanta, Brinellvägen 83, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20160523

Available from: 2016-05-23 Created: 2016-05-23 Last updated: 2016-05-23Bibliographically approved

Open Access in DiVA

FZG gear efficiency and pin-on-disc frictional study of sintered and wrought steel gear materials(1596 kB)202 downloads
File information
File name FULLTEXT01.pdfFile size 1596 kBChecksum SHA-512
502fd8ca6d25da8f7f64679bd39ddeda9cb60ac9f9d07a704bd41b5b6b5a04068c2c3bbd90a2c8a36d936f68aa8ac825568807b5b442249faf7380c1f805e9c6
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records BETA

Olofsson, Ulf

Search in DiVA

By author/editor
LI, XinminOlofsson, Ulf
By organisation
Machine Design (Dept.)
In the same journal
Tribology letters
Other Materials EngineeringMaterials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 202 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 92 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf